[alsa-devel] [PATCH 2/2] ALSA: hda: Unify get_response handling
Takashi Iwai
tiwai at suse.de
Thu Dec 12 20:11:01 CET 2019
Now most of the get_response handling became quite similar between
HDA-core and legacy drivers, and the only differences are:
- the handling of extra-long polling delay for some codecs
- the debug message for the stalled communication
and both are worth to share in the common code.
This patch unifies the code into snd_hdac_bus_get_response(), and use
this from the legacy get_response callback. It results in a good
amount of code reduction in the end.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
include/sound/hda_codec.h | 1 -
include/sound/hdaudio.h | 1 +
sound/hda/hdac_controller.c | 11 +++++++++-
sound/pci/hda/hda_controller.c | 49 ++++--------------------------------------
sound/pci/hda/hda_intel.c | 2 +-
sound/pci/hda/hda_tegra.c | 2 +-
sound/pci/hda/patch_ca0110.c | 2 +-
sound/pci/hda/patch_sigmatel.c | 2 +-
8 files changed, 19 insertions(+), 51 deletions(-)
diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h
index ac18f428eda6..3ee8036f5436 100644
--- a/include/sound/hda_codec.h
+++ b/include/sound/hda_codec.h
@@ -51,7 +51,6 @@ struct hda_bus {
DECLARE_BITMAP(pcm_dev_bits, SNDRV_PCM_DEVICES);
/* misc op flags */
- unsigned int needs_damn_long_delay :1;
unsigned int allow_bus_reset:1; /* allow bus reset at fatal error */
/* status for codec/controller */
unsigned int shutdown :1; /* being unloaded */
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 81373a2efd96..bc2f77a6f17b 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -338,6 +338,7 @@ struct hdac_bus {
bool reverse_assign:1; /* assign devices in reverse order */
bool corbrp_self_clear:1; /* CORBRP clears itself after reset */
bool polling_mode:1;
+ bool needs_damn_long_delay:1;
int poll_count;
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 61950b83b8c9..01787081552d 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -242,6 +242,7 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
unsigned long timeout;
unsigned long loopcounter;
wait_queue_entry_t wait;
+ bool warned = false;
init_wait_entry(&wait, 0);
timeout = jiffies + msecs_to_jiffies(1000);
@@ -264,9 +265,17 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
spin_unlock_irq(&bus->reg_lock);
if (time_after(jiffies, timeout))
break;
+#define LOOP_COUNT_MAX 3000
if (!bus->polling_mode) {
schedule_timeout(msecs_to_jiffies(2));
- } else if (loopcounter > 3000) {
+ } else if (bus->needs_damn_long_delay ||
+ loopcounter > LOOP_COUNT_MAX) {
+ if (loopcounter > LOOP_COUNT_MAX && !warned) {
+ dev_dbg_ratelimited(bus->dev,
+ "too slow response, last cmd=%#08x\n",
+ bus->last_cmd[addr]);
+ warned = true;
+ }
msleep(2); /* temporary workaround */
} else {
udelay(10);
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 870102f00efd..d6a7bda28925 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -784,53 +784,12 @@ static int azx_rirb_get_response(struct hdac_bus *bus, unsigned int addr,
{
struct azx *chip = bus_to_azx(bus);
struct hda_bus *hbus = &chip->bus;
- unsigned long timeout;
- unsigned long loopcounter;
- wait_queue_entry_t wait;
- bool warned = false;
+ int err;
- init_wait_entry(&wait, 0);
again:
- timeout = jiffies + msecs_to_jiffies(1000);
-
- for (loopcounter = 0;; loopcounter++) {
- spin_lock_irq(&bus->reg_lock);
- if (!bus->polling_mode)
- prepare_to_wait(&bus->rirb_wq, &wait,
- TASK_UNINTERRUPTIBLE);
- if (bus->polling_mode)
- snd_hdac_bus_update_rirb(bus);
- if (!bus->rirb.cmds[addr]) {
- if (res)
- *res = bus->rirb.res[addr]; /* the last value */
- if (!bus->polling_mode)
- finish_wait(&bus->rirb_wq, &wait);
- spin_unlock_irq(&bus->reg_lock);
- return 0;
- }
- spin_unlock_irq(&bus->reg_lock);
- if (time_after(jiffies, timeout))
- break;
-#define LOOP_COUNT_MAX 3000
- if (!bus->polling_mode) {
- schedule_timeout(msecs_to_jiffies(2));
- } else if (hbus->needs_damn_long_delay ||
- loopcounter > LOOP_COUNT_MAX) {
- if (loopcounter > LOOP_COUNT_MAX && !warned) {
- dev_dbg_ratelimited(chip->card->dev,
- "too slow response, last cmd=%#08x\n",
- bus->last_cmd[addr]);
- warned = true;
- }
- msleep(2); /* temporary workaround */
- } else {
- udelay(10);
- cond_resched();
- }
- }
-
- if (!bus->polling_mode)
- finish_wait(&bus->rirb_wq, &wait);
+ err = snd_hdac_bus_get_response(bus, addr, res);
+ if (!err)
+ return 0;
if (hbus->no_response_fallback)
return -EIO;
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index c86539cdbd4b..c7efb6f66bdc 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1809,7 +1809,7 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci,
if (chip->driver_type == AZX_DRIVER_NVIDIA) {
dev_dbg(chip->card->dev, "Enable delay in RIRB handling\n");
- chip->bus.needs_damn_long_delay = 1;
+ chip->bus.core.needs_damn_long_delay = 1;
}
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 269f242fcbfd..9d0784aed9e4 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -394,7 +394,7 @@ static int hda_tegra_create(struct snd_card *card,
if (err < 0)
return err;
- chip->bus.needs_damn_long_delay = 1;
+ chip->bus.core.needs_damn_long_delay = 1;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0) {
diff --git a/sound/pci/hda/patch_ca0110.c b/sound/pci/hda/patch_ca0110.c
index e780922a1190..1818ce67f761 100644
--- a/sound/pci/hda/patch_ca0110.c
+++ b/sound/pci/hda/patch_ca0110.c
@@ -53,7 +53,7 @@ static int patch_ca0110(struct hda_codec *codec)
codec->patch_ops = ca0110_patch_ops;
spec->multi_cap_vol = 1;
- codec->bus->needs_damn_long_delay = 1;
+ codec->bus->core.needs_damn_long_delay = 1;
err = ca0110_parse_auto_config(codec);
if (err < 0)
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 894f3f509e76..8ecb53bce509 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4908,7 +4908,7 @@ static int patch_stac927x(struct hda_codec *codec)
* The below flag enables the longer delay (see get_response
* in hda_intel.c).
*/
- codec->bus->needs_damn_long_delay = 1;
+ codec->bus->core.needs_damn_long_delay = 1;
snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_PROBE);
--
2.16.4
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